Flat key and associated cylinder lock

Abstract

The invention relates to a flat key (1) for a cylinder lock (2), comprising a coded key flat side (7), wherein at least three control grooves extending along the length of the flat key (1) are formed on the key flat side (7), wherein the control grooves each connect a plurality of control positions, wherein at least one control groove is in the form of a deep control groove (8) and at least two control grooves are in the form of shallow control grooves (9, 9'), wherein the shallow control grooves (9, 9') are substantially equal in depth and extend substantially parallel to one another, and wherein, on the key flat side (7), at least one additional control track (10) is provided which is arranged, at least in the region of the key tip (3), next to a shallow control groove (9, 9') or next to a deep control groove (8) and is in the form of a groove which is semi-open in the direction of the key back (5) or the key front (6) and separated from the nearest control groove (8, 9, 9') by a land of material (11).

Description

[0001] 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) Flat key and associated cylinder lock

[0002] The invention relates to a flat key and an associated cylinder lock.

[0003] Flat keys and cylinder locks are known from the prior art, for example from DE 3603687 A1. Such flat keys comprise a key tip, a key bow, a key back and a key body, as well as at least one coded flat side of the key.

[0004] It is also known to form at least three control grooves on the flat side of the key, extending in the longitudinal direction of the flat key, wherein the control grooves each connect several control points which are defined for coding the key at certain control heights and scanning positions on the flat side of the key.

[0005] Advantageously, at least one control groove is designed as a deep control groove, and at least two control grooves as shallow control grooves, with the deep control groove having a greater groove depth than the shallow control grooves. The shallow control grooves are essentially the same depth and run essentially parallel to each other.

[0006] In the corresponding cylinder lock, the control grooves are queried by control slides, which are arranged at predetermined positions in the cylinder core and have control elements projecting into the keyway. The control slides are movable up and down in a plane parallel to the keyway. When the flat key is inserted, the control elements are guided in the control grooves until the control slide reaches the assigned control points. Once the control slide is in the correct position, the cylinder lock engages. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT)

[0007] One problem with existing flat keys is the need for master keys and locks that are compatible with the existing flat keys and cylinder locks, but also allow the use of master key systems. Such master key systems would, for example, provide master keys for an office building with an existing system of flat keys and associated cylinder locks.

[0008] Specifically, new flat keys and new cylinder locks are to be created, with the new flat keys being able to operate both existing and new cylinder locks. Conversely, the existing flat keys should only be able to operate existing cylinder locks, not the new ones. Existing coding options for the key systems should remain unaffected, and the variety of available options should be maintained.

[0009] The object of the invention is to solve these and other problems and to create a new flat key and a new cylinder lock that is compatible with existing systems and yet enables the creation of a higher-level locking hierarchy through new keys and locks.

[0010] These and other problems are solved according to the invention by a flat key and a cylinder lock according to one of the independent patent claims.

[0011] A flat key according to the invention for a cylinder lock comprises a key tip and a key bow, a key back and a key body, as well as at least one coded key flat side. However, usually both key flat sides are coded, and the key is frequently designed as a reversible key, so that the codes on both sides are identical.

[0012] On the flat side of a flat key according to the invention, three or more control grooves extending longitudinally along the flat key are formed. In a corresponding cylinder lock, control slides arranged laterally in the cylinder core are positively guided in these control grooves. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) The control grooves each connect several control points, which are defined for coding the key at specific control heights and scanning positions on the flat side of the key.

[0013] For example, at least four, preferably equidistant, scanning positions can be provided in the direction of the key's longitudinal extension, i.e., from the key bow to the key tip. For example, six, preferably equidistant, scanning positions A to F can be provided, with scanning position F being located in the area of ​​the key tip.

[0014] Several, preferably equidistant, control heights can be provided transversely to the longitudinal extent of the key, i.e., in the direction from the back of the key to the face of the key. For example, six equidistant control heights a - f can be provided.

[0015] For example, the distance between the scanning positions can be approximately 3.5 mm, and the distance between the control heights approximately 0.5 mm to approximately 0.75 mm.

[0016] At least one control groove is designed as a deep control groove, and at least two control grooves are designed as shallow control grooves. The deep control groove has a greater groove depth than the shallow control grooves. The shallow control grooves are essentially the same depth and run essentially parallel to each other in the form of a double curve. The distance between the shallow control grooves can be approximately 2 mm to approximately 4 mm, for example, approximately 2.5 mm.

[0017] The deep control groove can have a depth of approximately 0.9 mm to approximately 1 mm, for example, approximately 1.03 mm or approximately 0.93 mm. The shallow control groove can have a depth of approximately 0.5 mm. The control grooves can each have a width of approximately 1 mm to approximately 2 mm, for example, approximately 1.28 mm.

[0018] The deep control groove, running as a single curve, can have more control heights than the shallow control grooves running as a double curve. For example, the single curve can have nine control heights, and the double curve seven. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT)

[0019] According to the invention, at least one control cam is provided on the flat side of the key in addition to the control grooves. The control cam is arranged adjacent to a shallow or deep control groove, at least in the region of the key tip. In particular, the control cam can begin at the key tip.

[0020] A control cam according to the invention is designed as a groove that is semi-open in the direction of the key spine or the key face. This means that the control cam has no side flank in either the direction of the key spine or the direction of the key face, i.e., it is open. On the opposite side, the control cam has a side flank which forms a ridge of material that separates the control cam from the adjacent control groove.

[0021] The control cam according to the invention enables the flat key to be used in a conventional cylinder lock designed to scan the control grooves. In a conventional cylinder lock equipped with conventional control slides for scanning the control grooves, the control cam remains inactive.

[0022] In contrast, cylinder locks according to the invention with adapted control slides can block the insertion of a flat key without the control cam according to the invention. Thus, a higher-level locking hierarchy can be formed that is compatible with existing locks but cannot be locked by existing keys.

[0023] According to the invention, the control cam can be essentially linear, triangular, roof-shaped, or trapezoidal. This allows for particularly low-friction insertion of a suitably adapted control slide into the control cam. Optionally, the control cam can also have a linear section that runs essentially parallel to the back or face of the key. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) The control cam can be, for example, approximately 3 mm, 5 mm, 10 mm, 15 mm, or 20 mm long, in particular approximately 5.5 mm. The control cam can have a width transverse to the longitudinal extent of the flat key of approximately 0.5 mm to approximately 2 mm, for example approximately 1.25 mm. The material web can, for example, have a width of approximately 0.5 mm to approximately 1.5 mm, for example approximately 0.95 mm, depending on how much space is required in the area of ​​the control cam up to the adjacent control groove.

[0024] The material rib can taper to a point at its end facing the key tip and may optionally have a guide surface that slopes towards the key face or back. This facilitates the insertion of a suitably adapted control slide from the key tip. However, the material rib can also be designed without such a guide surface and have a stop at the tip, so that the control slide can only be inserted into the control cam from the key back or only from the key face.

[0025] According to the invention, the control cam can have essentially the same depth as the shallow control grooves. Alternatively, the control cam can have essentially the same depth as the deep control groove. However, the control cam can also have a different depth than the shallow or deep control groove; in particular, it can be deeper than the deep control groove.

[0026] According to the invention, the control cam can be closed on three sides, namely towards the key tip, the key bow, and the key back or the key face, i.e., it has a groove flank. A corresponding control slide can then only be inserted into the control cam from the open side, i.e., starting from the key back or the key face.

[0027] However, it can also be provided that the control cam is partially, or optionally completely, open in the direction of the key tip, so that it only has a groove flank on two sides, namely in the direction of the key bow and the key back or the key face. This may allow easier insertion of a corresponding control slide into the control cam starting from the key tip. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) According to the invention, it can be provided that the control cam extends from the key tip only as far as the scanning position F. The control cam then ends directly before or at the scanning position F. This has the advantage that a flat key according to the invention differs from conventional flat keys only at the key tip, where the entry funnel for the control slide is located.This area is usually not coded to ensure clean insertion of the control slides into the control grooves, so that the control cam is not perceived as a code and consequently the security of the locking system is increased.

[0028] However, according to the invention, it can also be provided that the control curve extends beyond the scanning position F in the direction of the key bow, in particular only up to the scanning positions E, D, C, B or A. This, however, may reduce the control heights usable at the scanning positions.

[0029] According to the invention, the control curve can have a different depth in the region of a first scanning position than in the region of a second scanning position. For example, the control curve can be deeper in the region of scanning position F than in the region of scanning position E.

[0030] The invention further extends to a cylinder lock adapted for a flat key according to the invention. Such a cylinder lock comprises a cylinder core rotatably mounted in a cylinder housing and a keyway in the cylinder core with scanning positions provided along its longitudinal extent. At each scanning position, at least one lateral control slider is provided for engaging a control groove on a flat side of the key according to the invention.

[0031] First control slides with first control elements for engaging deep control grooves and second control slides with second control elements for engaging shallow control grooves are provided. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) The first and second control slides for scanning the deep and shallow control grooves can be arranged alternately on different sides of the keyway. This allows, if necessary, the simple scanning of the coding of reversible keys, which are coded identically on both sides.

[0032] Furthermore, at least one locking element actuated by the control slides is provided. The locking element can be configured to release the division line between the cylinder core and the cylinder housing in the release position and to block the division line in a locked position. The control slides have one or more sensing grooves for actuating the locking element, which interact with the locking element in one or more positions such that it assumes a release position in which the lock can be operated. Preferably, a separate locking element can be provided on each side of the keyway.

[0033] According to the invention, a first control slide comprises a control element for sensing the deep control groove, and a second control slide comprises two control elements for sensing the shallow control grooves. The control elements can be designed as cylindrical pins with a diameter of approximately 1 mm to 2 mm, for example, approximately 1.15 mm. The two control elements of the second control slide can be spaced approximately 2 mm to approximately 4 mm apart, for example, approximately 2.5 mm apart.

[0034] At least one of the lateral control slides can, in addition to the first control element or in addition to the second control elements, have a locking pin designed to engage, preferably in a form-fitting manner, in the control cam according to the invention on the flat side of the flat key. Optionally, it can be provided that only a single control slide in the cylinder core has such a locking pin. Preferably, this can be the control slide at the scanning position F, i.e., the scanning position furthest from the insertion opening of the key channel.

[0035] The locking pin can have a substantially round, circular, triangular, roof-shaped, or trapezoidal cross-section. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) Preferably, the locking pin is designed with a circular cross-section. However, the locking pin can also be designed as a triangle or trapezoid pointing towards the other control elements on the control valve.

[0036] The locking pin can be arranged or configured eccentrically to the control elements on the control valve. The locking pin can have a different height than the other control elements on the control valve. The locking pin can have different dimensions, in particular a different diameter, than the other control elements on the control valve. The locking pin can, in particular, have a smaller diameter than the other control elements.

[0037] The invention further extends to a locking system comprising a flat key and a cylinder lock according to the invention. The flat key is designed such that it locks the cylinder lock.

[0038] In such a key-lock combination, the shape of the locking bolt in the cylinder lock can be adapted to the shape of the control cam on the flat key, so that the locking bolt can engage positively in the control cam and be guided within it. However, forced guidance is not necessarily required; rather, the locking bolt can be under spring tension and pressed against the control cam.

[0039] According to the invention, the width of the material rib on the flat key can be less than or equal to the distance between the locking pin and the nearest control element. This ensures that the material rib can be inserted into the keyway between the locking pin and the nearest control element of the control slide when the flat key is inserted. Otherwise, the material rib would become stuck between the locking pin and the control element, blocking the insertion of the flat key into the keyway. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) The invention also extends to locking systems with several cylinder locks and several flat keys according to the invention.

[0040] Further features of the invention will become apparent from the description of the exemplary embodiments, the patent claims and the drawings.

[0041] The invention will be explained in more detail below using non-limiting embodiments. The illustrations show:

[0042] Fig. 1a a schematic side view of a flat key according to the invention; Fig. 1b a schematic three-dimensional view of a flat key according to the invention;

[0043] Fig. 2a - 2b shows a lateral and frontal sectional view of a locking system according to the invention;

[0044] Fig. 3a - 3i several schematic views of a flat key and a control slide according to the invention when the flat key is inserted into a cylinder lock according to the invention;

[0045] Figs. 4a - 4b schematic views of a control valve according to the invention;

[0046] Figs. 5a - 5b schematic views of a control valve according to the invention;

[0047] Fig. 6 shows a schematic three-dimensional view of the key tip of a flat key according to the invention;

[0048] Fig. 7 shows a schematic three-dimensional view of the key tip of a flat key according to the invention;

[0049] Fig. 8 shows a schematic side view of a flat key according to the invention.

[0050] Fig. 1a shows a schematic side view of a flat key 1 according to the invention. The flat key 1 extends longitudinally from a key tip 3 to a key bow 4 and transversely from a key back 5 to a key breast 6. Between these is a coded key flat 7, on which three control grooves 8, 9, 9' extending longitudinally along the flat key 1 are formed. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) The control grooves 8, 9, 9' each connect several control points, which are defined for coding the key at six predefined control heights a - f and six predefined scanning positions A - F on the key flat 7.In an associated cylinder lock, laterally arranged control slides are positively guided in the control grooves 8, 9, 9' and come to rest at the control points when the flat key 1 can be fully inserted into the cylinder lock. If the flat key 1 is authorized to lock the cylinder lock, the control slides interact with a locking element in such a way that the locking element assumes a release position in which the lock can be operated.

[0051] One of the three control grooves is designed as a deep control groove 8, and two control grooves are designed as shallow control grooves 9, 9'. The deep control groove 8 has a greater groove depth than the shallow control grooves 9, 9'. The shallow control grooves 9, 9' are essentially the same depth and run essentially parallel to each other as a so-called double curve. This ensures that in the associated cylinder lock, a first control slide is guided in the deep control groove 8 and a second control slide is guided in the two shallow control grooves 9, 9'.

[0052] At the key tip 3, the deep control groove 8 widens into an entry funnel into which the shallow control grooves 9, 9' transition. The entry funnel ensures that, when the flat key 1 is inserted into the keyway of a cylinder lock 2, the control slides are captured and securely guided in the corresponding control grooves 8, 9, 9' until the flat key 1 is fully inserted into the cylinder lock.

[0053] On the key flat 7, a control cam 10 is provided in the area of ​​the key tip 3 adjacent to the shallow control groove 9'. The control cam 10 is designed as a groove that is semi-open towards the key face 6 and is separated from the nearest shallow control groove 9' by a material web 11. The control cam 10 is closed towards the key tip 3 and defines a substantially trapezoidal recess into which a locking pin of a locking slide according to the invention can engage in a form-fitting manner. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) The material web 11 tapers to a point at an angle of approximately 70° towards the key tip 3 and forms an inclined guide surface, so that a control slide 15' entering from the front is guided into the control cam 10 without being blocked.In this version, the control curve 10 extends approximately 1.25 mm from the back of the key and has a width of approximately 0.4 mm up to the beginning of the key profile. The material web 11 has a width d1 of approximately 0.95 mm.

[0054] In this embodiment, the control cam 10 is essentially the same depth as the shallow control grooves 9, 9' and is closed in the direction of the key tip 3, the key bow 4, and the key back 5, thus having three groove flanks. Furthermore, the control cam extends only over a short area, beginning at the key tip 3 and ending before or at the first scanning position F. In this embodiment, there is no control cam 10 in the area of ​​scanning positions A - E.

[0055] While in this embodiment the control cam 10 is arranged below the control grooves 9, 9' and is open towards the key breast 6, in other embodiments of the invention the control cam 10 is arranged above the control grooves 9, 9' and is open towards the key back 5.

[0056] Furthermore, embodiments according to the invention are also provided in which the control cam 10 is not bounded on three sides by groove flanks, but only on two sides. In particular, an embodiment is provided in which the control cam 10 is wholly or partially open in the direction of the key tip to facilitate the insertion of the locking pin 20 into the control cam 10. In the case of only partial opening, the distance from the key face 6 to the lower flank of the control cam 10 is less than the distance to the lowest point of the control cam 10.

[0057] Fig. 1b shows a schematic three-dimensional view of the flat key 1 from Fig. 1a. The entry funnel, which transitions into the deep control groove 8 and the two shallow control grooves 9, 9', is clearly visible. The control cam 10 is formed as a small trapezoidal recess on the key face 6 and extends over a short area from the key tip 3 to the first scanning position. F.65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) A shallow control groove 9' runs alongside the control cam 10 and is separated by a material rib 11. The material rib 11 separates the control cam 10 from the key tip 3. The control cam 10 is essentially the same depth as the shallow control grooves 9, 9'.

[0058] Figures 2a-2b show a side and frontal sectional view of a locking system according to the invention, comprising a cylinder lock 2 according to the invention, into which a flat key 1 according to the invention is inserted. The cylinder lock 2 has a cylinder core 13 rotatably mounted in a cylinder housing 12. A key channel 14 with scanning positions A-F along its longitudinal extent is provided in the cylinder core 13. At each scanning position, two lateral control slides 15, 15' are arranged for engagement with control grooves 8, 9, 9' on a flat side 7 of the key 1. The section A-A shown is located in the area of ​​scanning position F.

[0059] First control slides 15 with first control elements 16 for engaging deep control grooves 8, and second control slides 15' with second control elements 17, 17' for engaging shallow control grooves 9, 9' are provided. Two locking elements 18, 18', actuated by the control slides 15, 15', are arranged laterally next to the control slides 15, 15'. For actuating the locking elements 18, 18', the control slides 15, 15' each have several sensing grooves 19, 19' which, in a release position, interact with the two locking elements 18, 18' in such a way that the locking elements assume a release position in which the division line between the cylinder core 13 and the cylinder housing 12 is released and the lock can be operated.

[0060] The control slide 15' shown on the right in Fig. 2b has, in addition to the second control elements 17, 17', a locking pin 20 which is designed to engage in a control cam 10 on the flat side 7 of the key 1. A key not according to the invention, lacking the control cam 10, could not be brought into the position shown, since the locking pin 20 would block its entry into this position. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) Figs. 3a - 3i show several schematic views of a flat key 1 and a cylinder lock according to the invention in several positions when the flat key is inserted into the keyway.

[0061] To better illustrate the invention, all components of the cylinder lock except for the control elements 17, 17' and the locking pin 20 of the control slide 15' have been hidden.

[0062] The locking pin 20 has a slightly smaller diameter than the control elements 17, 17'. When the flat key 1 is inserted into the keyway, the locking pin 20 is first moved downwards over a tip of the material rib 11 which runs at an angle of approximately 70° towards the face of the key (Figs. 3a-3c). The two control elements 17, 17' are still located in the entry funnel at this point.

[0063] The locking pin 20 then follows the path of the control cam 10 until the control elements 17, 17' reach the control points of the scanning position F (Fig. 3i). The thickness of the material web 11 corresponds essentially to the distance between the locking pin 20 and the nearest control element 17 or is slightly less, so that the material web 11 is guided between the locking pin 20 and the control element 17. A flat key that does not have the control cam 10 cannot be inserted into the cylinder lock 2, as the locking pin 20 would block further insertion.

[0064] Figures 4a-4b show schematic views of a control slide 15' according to the invention. The control slide 15' is essentially pin-shaped and movably mounted in the cylindrical core 13 next to the keyway 14. On its side facing the keyway 14, it has control elements 17, 17' which are designed to be guided positively in the shallow control grooves 9, 9'. On its reverse side, the control slide 15 has sensing grooves 19 which interact with a locking element 18 to release the division line between the cylinder core 13 and the cylinder housing 12 in a release position. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) In addition to the control elements 17, 17', the locking slide 15 has a locking pin 20 which is designed to engage in the control cam 10 on the key flat side 7 of the key 1.In order to enable the locking pin 20 to be inserted into the control cam 10 without problems, the locking pin 20 has an essentially triangular cross-section with inclined surfaces on both sides.

[0065] The distance d2 between the lower control element 17' and the locking pin 20 is greater than the maximum width d1 of the material web 11, so that the material web 11 can easily pass between the control element 17' and the locking pin 20.

[0066] The locking slide 15 shown is arranged at scanning position F in the keyway 14, while conventional locking slides without the locking pin are arranged at the other scanning positions A - E. A flat key without the control cam 10 at the key tip would jam at scanning position F when inserted into a cylinder lock with such a locking slide 15.

[0067] Figures 5a and 5b show schematic views of another control slide 15' according to the invention. The control slide 15' is essentially pin-shaped and has control elements 17, 17' in the form of cylindrical pins on one side, which are designed for guidance in shallow control grooves 9, 9'. Furthermore, a locking pin 20 is provided on this side below the control elements 17, 17', which is also essentially cylindrical and is designed to engage in a control cam 10 on the flat side 7 of the key 1. In this embodiment, the locking pin 20 is arranged eccentrically to the control elements 17, 17', i.e., it is not located on the same longitudinal axis as them. In addition, the locking pin 20 has a slightly smaller diameter than the control elements 17, 17'.

[0068] Fig. 6 shows a schematic three-dimensional view of the key tip 3 of a flat key 1 according to the invention. The entry funnel is visible here, which guides both the control elements 16 into the deep control groove 8 and the control elements 17, 17' into the two shallow control grooves 9, 9'. The control cam 10 is again designed as a semi-open groove, which has no flank in the direction of the key face 6. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) The depth of the control cam 10 corresponds to that of the deep control groove 8. Between the lower shallow control groove 9' and the control cam 10 is a material rib 11, which forms a threshold for the entry of the control elements 17, 17'. Towards the key tip 3, the material rib 11 again forms a point with an inclined surface.The locking pin 20 of a correspondingly designed control valve 15 can immerse itself in the control cam 10, so that the control element 16 can also immerse itself in the deep control groove 8.

[0069] Fig. 7 shows another schematic three-dimensional view of the key tip 3 of a flat key 1 according to the invention. In this embodiment, the control cam 10 is designed as a two-stage, semi-open groove that has no flank in the direction of the key body 6 and extends to the scanning position E. The depth of the control cam 10 in the area up to the scanning position F corresponds to that of the deep control groove 8. In the area from the scanning position F to the scanning position E, the depth of the control cam 10 corresponds to that of the shallow control grooves 9, 9'. Between the lower shallow control groove 9' and the control cam 10, a material ridge 11 is again formed, which forms a threshold for the entry of the control elements 17, 17'. Towards the key tip 3, the material ridge 11 again forms a point with an inclined surface.

[0070] This design allows the use of two control elements 15, 15' with different locking pins 20. The locking pin 20 of a suitable control slide 15 at the scanning position F has a length corresponding to the depth of the deep control groove 8. The locking pin 20 of a correspondingly designed control slide 15 at the scanning position E has a shorter length corresponding to the depth of the shallow control grooves 9, 9'.

[0071] Fig. 8 shows a schematic side view of another flat key 1 according to the invention. In this embodiment, the material web 11 tapers to a point towards the key tip 3, but does not form an inclined guide surface for the locking pin 20. The locking pin 20 of a control slide 15' can therefore only be inserted into the control cam 10 from below, i.e., from the key face 6. If, however, the locking pin 20 strikes the material web 11 from the key tip 3, it blocks and prevents further insertion of the key 1 into the keyway 14.65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT). In this embodiment, the control cam 10 is at least completely open in the direction of the key tip 3 and has a groove flank only in the direction of the key bow 4 and the key back 5.

[0072] The invention is not limited to the illustrated embodiments, but encompasses all flat keys, cylinder locks and locking systems within the scope of the following claims. 65364 / AG / VH

[0073] EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT)

[0074] Reference symbol list

[0075] 1 flat key

[0076] 2 cylinder lock

[0077] 3 Key tip

[0078] 4 key bows

[0079] 5 key spines

[0080] 6 Key Chest

[0081] 7 Key flat side 8 Deep control groove 9, 9' Shallow control groove 10 Control curve

[0082] 11 Material bridge

[0083] 12 Cylinder housing 13 Cylinder core

[0084] 14 Keyway 15, 15' Control slide

[0085] 16 First control elements 17, 17' Second control elements 18, 18' Locking element

[0086] 19, 19' query slot

[0087] 20 locking pins

Claims

65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) Patent claims 1. Flat key (1 ) for a cylinder lock (2), comprising a key tip (3) and a key bow (4), a key back (5) and a key breast (6), and at least one coded key flat side (7), wherein a. at least three control grooves extending longitudinally along the flat key (1) are formed on the key flat side (7), wherein b. the control grooves each connect several control points defined for coding the key at specific control heights and scanning positions on the key flat side (7), wherein c. at least one control groove is formed as a deep control groove (8) and at least two control grooves as shallow control grooves (9, 9'), wherein the deep control groove (8) has a greater groove depth than the shallow control grooves (9, 9'), and wherein the shallow control grooves (9, 9') are substantially the same depth and run substantially parallel to each other, characterized in that at least one additional control cam (10) is provided on the key flat side (7), which is arranged at least in the area of ​​the key tip (3) adjacent to a shallow control groove (9, 9') or a deep control groove (8), and which is designed as a groove that is semi-open in the direction of the key back (5) or the key face (6), which is separated from the nearest control groove (8, 9, 9') by a material web (11).

2. Flat key (1) according to claim 1, characterized in that the control cam (10) has substantially the same depth as the shallow control grooves (9, 9') or substantially the same depth as the deep control groove (8).

3. Flat key (1) according to claim 1, characterized in that the control cam (10) has a different depth than the shallow control grooves (9, 9') and the deep control groove (8). 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) 4. Flat key (1) according to any one of claims 1 to 3, characterized in that the control cam (10) is closed in the direction towards the key tip (3), the key bow (4) and the key back (5) or the key face (6), so that it has a groove flank in three directions.

5. Flat key (1) according to one of claims 1 to 3, characterized in that the control cam (10) is at least partially, if necessary completely, open in the direction of the key tip (3), so that it has a groove flank in only two directions.

6. Flat key (1) according to one of claims 1 to 5, characterized in that at least four, for example six, scanning positions A - F are provided in the direction of the longitudinal extension of the key (1), wherein the scanning position F is provided in the area of ​​the key tip (3), and wherein the control cam (10) extends from the key tip (3) only to the scanning position F.

7. Flat key (1) according to one of claims 1 to 5, characterized in that at least four, for example six, scanning positions A - F are provided in the direction of the longitudinal extension of the key (1), wherein the scanning position F is provided in the area of ​​the key tip (3), and wherein the control cam (10) extends beyond the scanning position F in the direction of the key bow (4), in particular only to the scanning positions E, D, C, B or A.

8. Flat key (1) according to claim 7, characterized in that the control cam (10) has a different depth in the area of ​​a first scanning position than in the area of ​​a second scanning position. 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) 9. Cylinder lock for a flat key (1) according to any one of claims 1 to 8, comprising a. a cylinder core (13) rotatably mounted in a cylinder housing (12), b. a key channel (14) with scanning positions provided along the longitudinal extent of the key channel (14), wherein at least one lateral control slider (15, 15') is provided at each scanning position for engagement in a control groove (8, 9, 9') on a key flat side (7) of the key (1), wherein i. first control slides (15) with first control elements (16) for engagement in deep control grooves (8), and ii. second control slides (15') with second control elements (17, 17') for engagement in shallow control grooves (9, 9') are provided, c. at least one locking element (18, 18') actuated by the control slides (15, 15'), wherein the control slides (15, 15') have one or more query grooves (19, 19') for actuating the locking element (18, 18'), which in one or more positions interact with the locking element (18, 18') such that the latter assumes a release position in which the lock can be actuated, characterized by the fact that d. at least one of the control valves (15, 15') has a locking pin (20) in addition to the first control element (16) or in addition to the second control elements (17, 17'), wherein e. the locking pin (20) is designed to engage, preferably in a form-fitting manner, in a control cam (10) on the key flat side (7) of the flat key (1).

10. Cylinder lock according to claim 9, characterized in that the locking pin (20) has a substantially round, circular, triangular or trapezoidal cross-section.

11. Cylinder lock according to claim 9 or 10, characterized in that the locking bolt (20) is arranged or designed eccentrically to the control elements (16, 17, 17') arranged on the control slide (15). 65364 / AG / VH EWA Sicherheitstechnologie GmbH, Wienerbergstraße 59-65, 1120 Vienna (AT) 12. Cylinder lock according to one of claims 9 to 11, characterized in that the locking pin (20) has a different height than the control elements (16, 17, 17') arranged on the control slide (15, 15').

13. Cylinder lock according to one of claims 9 to 12, characterized in that the locking pin (20) has different dimensions, in particular a different diameter, than the other control elements (16, 17, 17') arranged on the control slide (15, 15').

14. Locking system comprising a flat key (1) according to one of claims 1 to 8 and a cylinder lock according to one of claims 9 to 13.

15. Locking system according to claim 14, characterized in that the shape of the locking pin (20) is adapted to the shape of the control cam (10) so that the locking pin (20) engages positively in the control cam (10).

16. Locking system according to claim 15, characterized in that the width of the material web (11) is less than or equal to the distance of the locking pin (20) from the nearest control element (16, 17, 17'), so that the material web (11) can be inserted between the locking pin (20) and the nearest control element (16, 17, 17') of the control slide (15, 15') when the flat key (1) is inserted into the key channel (14).

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